Was about 1972 when my father take me to the movie (Cine Obregón) in México City to wath a II WW Movie, however, at that time,the Mexico's Teathers present a short movie before the important one. In that case, was this "CENTINELAS DEL SILENCIO". At that time I was 10 years old and since then, I forgot the principal movie. Not the same with Centinelas del Silencio. I spent more than ten years looking for a decent copy of this really, only on its type, remarcable movie. About three years ago, with a lot of patience and dedication I could find the Mexican Company wich remastered the movie. The most amazig thing is that the remastering is superv and you have two menus, one in englih narrated by Ricardo Montalban, who recently passes away, and the ENGLISH version, narrated by Orson Wells. Both, English and Spanish versions are indescriptible outstanding. The best documental short movie I've ever seeing. I plantiful recomend you this incredible documentary.
You can find the DVD in www.mexicoantiguo.com.mx